字符串操作

#include "stdio.h"
void del(char a[],char c){
        int i,j;
        for(i=0;a[i]!='\0';i++){
                if(a[i]==c){
        for(j=i;j<strlen(a);j++){
                a[j]=a[j+1];
        }
        }
                }
        }
char *del2(char *str,char c){
         char *p=str;
         while(*p){
                if(*p!=c){
                   *str++=*p;
                }
                p++;
                }
        *str='\0';
        return p;
        }
void reverse2(char *str){
        char *pre=str+strlen(str)-1;
        while(str!=pre){
                char c=*str;
                *str=*pre;
                *pre=c;
                str++;
                if(str==pre) break;
                else pre--;
        }

}
int main(){
  char str[]="abcdaef";
  reverse2(str);
  printf("%s\n",str);
  del2(str,'c');
  printf("%s\n",str);
}

del函数删除指定字符，reverser反转字符串